应该是
delete from student where username like 'a%' and username like '%b'
like 'a%b'这种不行的。如'abc' 也会删掉
具体哪个字段啊?
比如username字段:
delete from student t where t.username like 'a%b' ;
比如username字段:
delete from student t where left(t.username,1)='a' and rihgt(t.username,1)='b'
delete from student where username like ('a%b');